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Voltage anode and cathode polarity switching circuit

A technology of switching circuits, positive and negative electrodes, applied in the power supply field, can solve the problem of the latter stage not working, and achieve the effect of product quality improvement, reliable function, and simplified procedures

Inactive Publication Date: 2012-07-11
SHENZHEN GOLD POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this kind of circuit, the input terminal can be reversed, but after reversed connection, the subsequent stage cannot work

Method used

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  • Voltage anode and cathode polarity switching circuit
  • Voltage anode and cathode polarity switching circuit
  • Voltage anode and cathode polarity switching circuit

Examples

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Embodiment 1

[0015] Example 1, such as figure 2 As shown, this embodiment is a polarity switching circuit connected to a DC-DC circuit, which can be set at the output end of a product that supplies power to a lower circuit, or at the input end of a product that receives power from a higher level. like figure 2 As shown: the voltage positive and negative polarity switching circuit in this embodiment is set between the output terminal of the power supply terminal and the input terminal of the power receiving terminal. Here, the output terminal of the power supply terminal is set to include the power supply A terminal and the power supply B terminal. When in use, the power supply A terminal may be positive or negative. Similarly, when the power supply A terminal is positive, the power supply B terminal is negative, and when the power supply A terminal is negative, the power supply B terminal is positive. The input terminal of the receiving end includes the receiving positive pole and the r...

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Abstract

The invention discloses a voltage anode and cathode polarity switching circuit. When the polarity of the power supply output end is unsure, the anode of the power supply output end is always connected with the electrical receiving anode of the electrical receiving input end, and the cathode of the power supply output end is connected with the electrical receiving cathode of the electrical receiving input end by controlling a double-pole double-throw relay. The circuit of the invention is simple in structure, low in cost and failure rate and reliable in function. The suitability of the product is improved, thereby improving the grade of the product. When the circuit is used in aging work, the circuit can reduce the labor intensity of the operator of aged DC / DC (direct current) power supply and improve the working comfort so as to improve the corporate image. The error rate of the operation is indirectly reduced due to the reduction of the labor intensity of the aging operator and the simplification of the program. The circuit is extremely wide in application range, namely, the circuit can be used in optional area needing distinction between voltage polarity inputs. For the variable input voltage, only the D1 needs to be short circuited by a lead, such as telephone access.

Description

technical field [0001] The invention relates to the field of power supply, in particular to a circuit for switching the positive and negative poles of the voltage in the input and output circuits of the power supply. Background technique [0002] Currently, DC / DC power supplies are generally used in such situations. For example, the output voltage of the storage battery of various automobiles is 12V, and a DC power supply of 48V is also used. But there are many precision devices inside the car, which require various voltages, such as: 5V, 12V and -12V, so the 48V power supply needs to be converted into 5V, 12V and -12V power supply, which is the DC / DC power supply. For all DC / DC power supplies, its input voltage (such as 48V input power supply) has polarity. If the input voltage is reversed, if the power supply itself has no protection circuit, it will burn out its MOS tube and some important components; if If there is a protection circuit, the power supply will not start ...

Claims

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Application Information

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IPC IPC(8): H02M3/44
Inventor 刘春跃李有富
Owner SHENZHEN GOLD POWER TECH
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